condition mean min max ZT0-3 11.620321 11.620321 11.620321 ZT4-7 12.004029 12.004029 12.004029 ZT8-11 11.0442735 11.0442735 11.0442735 ZT12-15 10.490576 10.490576 10.490576 ZT16-19 10.1314175 10.1314175 10.1314175 ZT20-23 11.1884005 11.1884005 11.1884005